diff --git a/backends/twitter/libtwitcurl/twitcurl.h b/backends/twitter/libtwitcurl/twitcurl.h
index 8db0d682809c6324770b86a95a9d688aa996864e..d04ad042eecb4f6e60e0d551037291b586f2b266 100644
--- a/backends/twitter/libtwitcurl/twitcurl.h
+++ b/backends/twitter/libtwitcurl/twitcurl.h
@@ -163,7 +163,7 @@ public:
     bool followersGet( std::string userInfo = "" /* in */, bool isUserId = false /* in */ );
 
     /* Twitter direct message APIs */
-    bool directMessageGet();
+    bool directMessageGet( std::string sinceId /* in */ );
     bool directMessageSend( std::string& userInfo /* in */, std::string& dMsg /* in */, bool isUserId = false /* in */ );
     bool directMessageGetSent();
     bool directMessageDestroyById( std::string& dMsgId /* in */ );